Contact Us Live Chat or 1-888-220-8330
Search Bar
Search by Part Number or Keywords
  • My Garage
  • My Account
  • Cart
  • Body & Mirrors
  • Chassis & Brakes
  • Engine & Drivetrain
  • Electrical & Lighting
Help Center
< Back ×
Replacement and OEM Parts for 2021 GMC Sierra 3500 HD Lighting Wiring Harnesses

2021 GMC Sierra 3500 HD Lighting Wiring Harnesses

My Vehicle Change Vehicle
2021 GMC Sierra 3500 HD
Change Vehicle
Vehicle Options
We need more information about your vehicle to make a correct determination of fitment
< Back to View All
Relays, Wiring & Connectors
  • Department
  • Prices

6 Products found

Show Item:
  • 30
  • 60
  • 90
Sort by:
Recommended
Filter
Sort
View by
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Socket & Wire

    PartNumber: 84058337
    OEM 2021 GMC Sierra 3500 HD Socket & Wire - 84058337
    Product Specifications
    • Notes: Regular Cab
    • Other Names: Harness, Socket Wire
    • Item Dimensions: 3.5 x 1.5 x 1.1 inches
    • Fitment Type: Direct Replacement
    • Replaces: 22869173
    • Part Description: 2021 GMC Sierra 3500 HD Socket & Wire
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | Base, Denali, SLE, SLT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $14.82 MSRP: $23.50
    You Save: $8.68 (37%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Harness

    PartNumber: 84859038
    OEM 2021 GMC Sierra 3500 HD Harness - 84859038
    Product Specifications
    • Notes: Double, Crew Cab, W/Pickup Box Camera, W/O Inside Mirror Display Camera
    • Other Names: Harness
    • Fitment Type: Direct Replacement
    • Replaces: 84599551
    • Part Description: 2021 GMC Sierra 3500 HD Harness
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $45.48 MSRP: $72.22
    You Save: $26.74 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Harness

    PartNumber: 84859040
    OEM 2021 GMC Sierra 3500 HD Harness - 84859040
    Product Specifications
    • Other Names: Harness
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Harness
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | Base, SLE | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $35.65 MSRP: $56.61
    You Save: $20.96 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Harness

    PartNumber: 84599550
    OEM 2021 GMC Sierra 3500 HD Harness - 84599550
    Product Specifications
    • Notes: Double, Crew Cab, W/O Pickup Box Camera, W/Inside Mirror Display Camera
    • Other Names: Harness
    • Fitment Type: Direct Replacement
    • Part Description: 2021 GMC Sierra 3500 HD Harness
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $32.94 MSRP: $52.31
    You Save: $19.37 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD Harness

    PartNumber: 84599549
    OEM 2021 GMC Sierra 3500 HD Harness - 84599549
    Product Specifications
    • Other Names: Harness
    • Fitment Type: Direct Replacement
    • Replaced by: 84859036
    • Part Description: 2021 GMC Sierra 3500 HD Harness
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $30.96 MSRP: $49.17
    You Save: $18.21 (38%)
  • OEM (Genuine) 2021 GMC Sierra 3500 HD HARNESS ASM-I/S RR VIEW MIR WRG

    PartNumber: 84859039
    OEM 2021 GMC Sierra 3500 HD HARNESS ASM-I/S RR VIEW MIR WRG - 84859039
    Product Specifications
    • Notes: Double, Crew Cab, W/Pickup Box Camera, W/Inside Mirror Display Camera
    • Other Names: Harness
    • Fitment Type: Direct Replacement
    • Replaces: 84599552, 84791002
    • Part Description: 2021 GMC Sierra 3500 HD HARNESS ASM-I/S RR VIEW MIR WRG
    More Info
    Vehicle Fitment
    • 2021 GMC Sierra 3500 HD | AT4, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L GAS
    $53.35 MSRP: $84.73
    You Save: $31.38 (38%)